In vitro and in vivo pharmacokinetic characterization of LMT-28 as a novel small molecular interleukin-6 inhibitor

Sung Hoon Ahn, Tae Hwe Heo, Hyun Sik Jun, Yongseok Choi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Objective: Interleukin-6 (IL-6) is a T cell-derived B cell stimulating factor which plays an important role in inflammatory diseases. In this study, the pharmacokinetic properties of LMT-28 including physicochemical property, in vitro liver microsomal stability and an in vivo pharmacokinetic study using BALB/c mice were characterized. Methods: LMT-28 has been synthesized and is being developed as a novel therapeutic IL-6 inhibitor. The physicochemical properties and in vitro pharmacokinetic profiles such as liver microsomal stability and Madin-Darby canine kidney (MDCK) cell permeability assay were examined. For in vivo pharmacokinetic studies, pharmacokinetic parameters using BALB/c mice were calculated. Results: The logarithm of the partition coefficient value (LogP; 3.65) and the apparent permeability coefficient values (Papp; 9.7⋯10-6 cm/s) showed that LMT-28 possesses a moderate-high cell permeability property across MDCK cell monolayers. The plasma protein binding rate of LMT-28 was 92.4% and mostly bound to serum albumin. The metabolic half-life (t1/2) values of LMT-28 were 15.3 min for rat and 21.9 min for human at the concentration 1 μM. The area under the plasma drug concentration-time curve and Cmax after oral administration (5 mg/kg) of LMT-28 were 302±209 and 137±100 ng/mL, respectively. Conclusion: These data suggest that LMT-28 may have good physicochemical and pharmacokinetic properties and may be a novel oral drug candidate as the first synthetic IL-6 inhibitor to ameliorate mammalian inflammation.

Original languageEnglish
Pages (from-to)670-677
Number of pages8
JournalAsian-Australasian Journal of Animal Sciences
Issue number4
Publication statusPublished - 2020


  • Gp130
  • Inflammation
  • Interleukin-6
  • Metabolic stability
  • Pharmacokinetics

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Engineering(all)


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